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Electronic structure and magnetism of selected materials

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https://osnadocs.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2003073016
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dc.contributor.advisorApl. Prof. Dr. M. Neumann
dc.creatorChiuzbaian, Gheorghe Sorin
dc.date.accessioned2010-01-30T14:35:43Z
dc.date.available2010-01-30T14:35:43Z
dc.date.issued2003-07-30T12:01:29Z
dc.date.submitted2003-07-30T12:01:29Z
dc.identifier.urihttps://osnadocs.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2003073016-
dc.description.abstractThe details of the interplay between the electronic structure and the magnetic properties of matter represent a state of the art challenge. In the present work spectroscopic investigations on the electronic structure of some interesting materials are presented. The achieved information has been used in order to answer specific questions related to the magnetic behavior of the investigated materials. For the transition metal dicyanamide compounds it is shown that the electronic states arising from carbon and nitrogen remain roughly unchanged for all compositions. A model for the magnetic superexchange interaction was proposed. In this model the geometry of the crystallographic structure accounts for a particular interaction pattern while the occupancy of the 3d transition metal band is the factor which triggers the changeover from antiferromagnetic to ferromagnetic interaction. In the case of six-membered ferric-wheel molecules the comparison between experimental and theoretical data issued estimations for the magnitude of magnetic exchange interactions. The information on the electronic structure of the LaNi5-xMex (Me=Cu, Al) allowed a better understanding of their magnetic behavior. The changes induced in the electronic structure of the parent compound by partial substitutions of nickel by copper or aluminum are discussed.eng
dc.language.isoeng
dc.subjectelectronic structure
dc.subjectXPS
dc.subjectXES
dc.subjectmetal-organic compounds
dc.subjectintermetallic compounds
dc.subject.ddc540 - Chemieger
dc.titleElectronic structure and magnetism of selected materialseng
dc.typeDissertation oder Habilitation [doctoralThesis]-
thesis.locationOsnabrück-
thesis.institutionUniversität-
thesis.typeDissertation [thesis.doctoral]-
thesis.date2003-07-09T12:00:00Z-
elib.elibid238-
elib.marc.edtfangmeier-
elib.dct.accessRightsa-
elib.dct.created2003-07-24T17:12:58Z-
elib.dct.modified2003-07-30T12:01:29Z-
dc.contributor.refereeProf. Dr. G. Borstel
dc.subject.dnb29 - Physik, Astronomieger
dc.subject.pacs79.60.-i - Photoemission and photoelectron spectraeng
dc.subject.pacs71.20.-b - Electron density of states and band structure of crystalline solidseng
dc.subject.pacs75.30.Et - Exchange and superexchange interactionseng
dc.subject.pacs75.50.Xx - Molecular magnetseng
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